Johnathan- > > The LFRX has two separate antenna inputs, supplied to Vin-A and > > Vin-B. These are not I-Q data. USRP board FPGA logic would apply > > one mixer or two (30 MHz or less). > > [...] > > > The RFX2400 mixes with a 2.4 GHz osc and creates one set of I-Q 65 > > MHz range signals, +/-I on Vin-A and +/-Q on Vin-B. To get baseband > > signals, the logic has to apply two mixers. > > The FPGA DDC logic uses a single but *complex* mixer to do frequency > conversion of the signal from the ADCs. That is, it treats the data > from Vin-A and Vin-B as a complex number in I and Q format, and > multiplies this complex number by a complex sinusoid of a configurable > frequency. This is very different from having two mixers.
Yes thanks for that correction. That's accurate for RFX2400. For the LFRX Vin-A and Vin-B are treated as separate RF inputs and not a combined I-Q data set. -Jeff _______________________________________________ Discuss-gnuradio mailing list [email protected] http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
